12. In the given figures below, decide whether lis parallel to m.
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Answer:
(i) 125
o
+44
o
=169
o
l is not parallel to m because sum of interior opposite angles should be 180
o
.
(ii) 75
o
+75
o
=150
o
l is not parallel to m because sum of angle does not obey the property of parallel lines.
(iii) 57
o
+123
o
=180
o
l is parallel to m due to supplementary angles property of parallel lines.
(iv) 98
o
+72
o
=170
o
l is not parallel to m because sum of angle does not obey the property of parallel lines.
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